qemu/0177-slirp-improve-TFTP-performance.patch

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2012-10-28 18:05:07 +00:00
From c1b408d0c9d836e0a95d1e0695c0c6c605ceb368 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herv=C3=A9=20Poussineau?= <hpoussin@reactos.org>
Date: Mon, 10 Sep 2012 20:52:25 +0200
Subject: [PATCH] slirp: improve TFTP performance
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When transferring a file, keep it open during the whole transfer,
instead of opening/closing it for each block.
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
(cherry picked from commit 78be056628c76ff73eedeade86fde44b97343c79)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
slirp/tftp.c | 32 ++++++++++++++++++--------------
slirp/tftp.h | 1 +
2 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/slirp/tftp.c b/slirp/tftp.c
index b78765f..520dbd6 100644
--- a/slirp/tftp.c
+++ b/slirp/tftp.c
@@ -37,6 +37,10 @@ static inline void tftp_session_update(struct tftp_session *spt)
static void tftp_session_terminate(struct tftp_session *spt)
{
+ if (spt->fd >= 0) {
+ close(spt->fd);
+ spt->fd = -1;
+ }
g_free(spt->filename);
spt->slirp = NULL;
}
@@ -54,7 +58,7 @@ static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp)
/* sessions time out after 5 inactive seconds */
if ((int)(curtime - spt->timestamp) > 5000) {
- g_free(spt->filename);
+ tftp_session_terminate(spt);
goto found;
}
}
@@ -64,6 +68,7 @@ static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp)
found:
memset(spt, 0, sizeof(*spt));
memcpy(&spt->client_ip, &tp->ip.ip_src, sizeof(spt->client_ip));
+ spt->fd = -1;
spt->client_port = tp->udp.uh_sport;
spt->slirp = slirp;
@@ -95,24 +100,23 @@ static int tftp_session_find(Slirp *slirp, struct tftp_t *tp)
static int tftp_read_data(struct tftp_session *spt, uint16_t block_nr,
uint8_t *buf, int len)
{
- int fd;
- int bytes_read = 0;
-
- fd = open(spt->filename, O_RDONLY | O_BINARY);
+ int bytes_read = 0;
- if (fd < 0) {
- return -1;
- }
+ if (spt->fd < 0) {
+ spt->fd = open(spt->filename, O_RDONLY | O_BINARY);
+ }
- if (len) {
- lseek(fd, block_nr * 512, SEEK_SET);
+ if (spt->fd < 0) {
+ return -1;
+ }
- bytes_read = read(fd, buf, len);
- }
+ if (len) {
+ lseek(spt->fd, block_nr * 512, SEEK_SET);
- close(fd);
+ bytes_read = read(spt->fd, buf, len);
+ }
- return bytes_read;
+ return bytes_read;
}
static int tftp_send_oack(struct tftp_session *spt,
diff --git a/slirp/tftp.h b/slirp/tftp.h
index 72e5e91..9c364ea 100644
--- a/slirp/tftp.h
+++ b/slirp/tftp.h
@@ -33,6 +33,7 @@ struct tftp_t {
struct tftp_session {
Slirp *slirp;
char *filename;
+ int fd;
struct in_addr client_ip;
uint16_t client_port;